[gtk] (6 commits) Non-fast-forward update to branch wip/sadiq/fixes

[Mohammed Sadiq <pksadiq src gnome org>]

The branch 'wip/sadiq/fixes' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  b1395e2... search-bar: Handle events after the focused widget handles 

Commits added to the branch:

  1b208eb... combobox: Remove priv pointer (*)
  d3ffaa0... button: Remove measure implementation (*)
  7f8106f... gl renderer: call glViewport directly (*)
  0b12fd9... center box: Remove snapshot implementation (*)
  f6d70f7... search bar example: remove unused function (*)
  d9bd8be... search-bar: Handle events after the focused widget handles 

(*) This commit already existed in another branch; no separate mail sent